On May 11, 1:41 ¨Âí¬ Êïèî ¼êèó®®®Àçíáéì®ãïí¾ ÷òïôåº
> The command gem list -rd  ¨Âçåîåòáôåôèæïììï÷éîåòòïòº
>
> C:\gemlist>gem list -rd a
>
> *** REMOTE GEMS ***
>
> ERROR:  ¨Âèéìå åøåãõôéîçå®®¨ÁòçõíåîôÅòòïò> undefined class/module YAML::Syck::DefaultKey
>
> C:\Users\spanton\gemlist>gem update --system
> Latest version currently installed. Aborting.
>
> -------------------------------------------------------------------
> I running the following software:
>
> Windows 7
> ruby 1.9.2p180 (2011-02-18) [i386-mingw32]
> gem .8.1
>
> Any suggetions or workaround?

Please provide the full output of "gem env" plus the same command with
"--debug -V" options:

gem list -rd --debug -V

One small note, listing remote gems might take a while, are you sure
you want to do that instead of browse rubygems.org?

--
Luis Lavena